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<div class="title">src/ca/uqac/dim/turtledb/XmlQueryFormatter.java</div>  </div>
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<a href="_xml_query_formatter_8java.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*-------------------------------------------------------------------------</span>
<a name="l00002"></a>00002 <span class="comment">    Simple distributed database engine</span>
<a name="l00003"></a>00003 <span class="comment">    Copyright (C) 2012  Sylvain Hallé</span>
<a name="l00004"></a>00004 <span class="comment"></span>
<a name="l00005"></a>00005 <span class="comment">    This program is free software: you can redistribute it and/or modify</span>
<a name="l00006"></a>00006 <span class="comment">    it under the terms of the GNU General Public License as published by</span>
<a name="l00007"></a>00007 <span class="comment">    the Free Software Foundation, either version 3 of the License, or</span>
<a name="l00008"></a>00008 <span class="comment">    (at your option) any later version.</span>
<a name="l00009"></a>00009 <span class="comment"></span>
<a name="l00010"></a>00010 <span class="comment">    This program is distributed in the hope that it will be useful,</span>
<a name="l00011"></a>00011 <span class="comment">    but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00012"></a>00012 <span class="comment">    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the</span>
<a name="l00013"></a>00013 <span class="comment">    GNU General Public License for more details.</span>
<a name="l00014"></a>00014 <span class="comment"></span>
<a name="l00015"></a>00015 <span class="comment">    You should have received a copy of the GNU General Public License</span>
<a name="l00016"></a>00016 <span class="comment">    along with this program.  If not, see &lt;http://www.gnu.org/licenses/&gt;.</span>
<a name="l00017"></a>00017 <span class="comment"> -------------------------------------------------------------------------*/</span>
<a name="l00018"></a>00018 <span class="keyword">package </span>ca.uqac.dim.turtledb;
<a name="l00019"></a>00019 
<a name="l00020"></a>00020 <span class="keyword">import</span> java.io.StringWriter;
<a name="l00021"></a>00021 <span class="keyword">import</span> javax.xml.transform.*;
<a name="l00022"></a>00022 <span class="keyword">import</span> javax.xml.transform.dom.DOMSource;
<a name="l00023"></a>00023 <span class="keyword">import</span> javax.xml.transform.stream.StreamResult;
<a name="l00024"></a>00024 <span class="keyword">import</span> org.w3c.dom.*;
<a name="l00025"></a>00025 
<a name="l00036"></a><a class="code" href="classca_1_1uqac_1_1dim_1_1turtledb_1_1_xml_query_formatter.html">00036</a> <span class="keyword">public</span> <span class="keyword">class </span><a class="code" href="classca_1_1uqac_1_1dim_1_1turtledb_1_1_xml_query_formatter.html">XmlQueryFormatter</a>
<a name="l00037"></a>00037 {
<a name="l00043"></a><a class="code" href="classca_1_1uqac_1_1dim_1_1turtledb_1_1_xml_query_formatter.html#a78948dd1a52df58aeca9a7088ab06a8d">00043</a>   <span class="keyword">public</span> <span class="keyword">static</span> Document <a class="code" href="classca_1_1uqac_1_1dim_1_1turtledb_1_1_xml_query_formatter.html#a78948dd1a52df58aeca9a7088ab06a8d">toXmlDocument</a>(<a class="code" href="classca_1_1uqac_1_1dim_1_1turtledb_1_1_relation.html">Relation</a> q)
<a name="l00044"></a>00044   {
<a name="l00045"></a>00045     <a class="code" href="classca_1_1uqac_1_1dim_1_1turtledb_1_1_xml_query_visitor.html">XmlQueryVisitor</a> v = <span class="keyword">new</span> <a class="code" href="classca_1_1uqac_1_1dim_1_1turtledb_1_1_xml_query_visitor.html">XmlQueryVisitor</a>();
<a name="l00046"></a>00046     <span class="keywordflow">try</span>
<a name="l00047"></a>00047     {
<a name="l00048"></a>00048       q.<a class="code" href="classca_1_1uqac_1_1dim_1_1turtledb_1_1_relation.html#adb708409ab8c4a428ed102c4ce850ffe">accept</a>(v);
<a name="l00049"></a>00049     }
<a name="l00050"></a>00050     <span class="keywordflow">catch</span> (<a class="code" href="classca_1_1uqac_1_1dim_1_1turtledb_1_1_empty_query_visitor.html">EmptyQueryVisitor</a>.VisitorException e)
<a name="l00051"></a>00051     {
<a name="l00052"></a>00052       e.printStackTrace();
<a name="l00053"></a>00053     }
<a name="l00054"></a>00054     <span class="keywordflow">return</span> v.<a class="code" href="classca_1_1uqac_1_1dim_1_1turtledb_1_1_xml_query_visitor.html#ae4f243f835054c721b11df0ef666778e">getDocument</a>();
<a name="l00055"></a>00055   }
<a name="l00056"></a>00056   
<a name="l00063"></a><a class="code" href="classca_1_1uqac_1_1dim_1_1turtledb_1_1_xml_query_formatter.html#ad5f81fab61516198acd7e3b14d4327a1">00063</a>   <span class="keyword">public</span> <span class="keyword">static</span> String <a class="code" href="classca_1_1uqac_1_1dim_1_1turtledb_1_1_xml_query_formatter.html#ad5f81fab61516198acd7e3b14d4327a1">toXmlString</a>(<a class="code" href="classca_1_1uqac_1_1dim_1_1turtledb_1_1_relation.html">Relation</a> q)
<a name="l00064"></a>00064   {
<a name="l00065"></a>00065     Document doc = <a class="code" href="classca_1_1uqac_1_1dim_1_1turtledb_1_1_xml_query_formatter.html#a78948dd1a52df58aeca9a7088ab06a8d">toXmlDocument</a>(q);
<a name="l00066"></a>00066     <span class="keywordflow">try</span>
<a name="l00067"></a>00067     {
<a name="l00068"></a>00068        DOMSource domSource = <span class="keyword">new</span> DOMSource(doc);
<a name="l00069"></a>00069        StringWriter writer = <span class="keyword">new</span> StringWriter();
<a name="l00070"></a>00070        StreamResult result = <span class="keyword">new</span> StreamResult(writer);
<a name="l00071"></a>00071        TransformerFactory tf = TransformerFactory.newInstance();
<a name="l00072"></a>00072        tf.setAttribute(<span class="stringliteral">&quot;indent-number&quot;</span>, <span class="keyword">new</span> Integer(2));
<a name="l00073"></a>00073        Transformer transformer = tf.newTransformer();
<a name="l00074"></a>00074        transformer.setOutputProperty(OutputKeys.INDENT, <span class="stringliteral">&quot;yes&quot;</span>);
<a name="l00075"></a>00075        transformer.transform(domSource, result);
<a name="l00076"></a>00076        <span class="keywordflow">return</span> writer.toString();
<a name="l00077"></a>00077     }
<a name="l00078"></a>00078     <span class="keywordflow">catch</span>(TransformerException ex)
<a name="l00079"></a>00079     {
<a name="l00080"></a>00080        ex.printStackTrace();
<a name="l00081"></a>00081        <span class="keywordflow">return</span> null;
<a name="l00082"></a>00082     }
<a name="l00083"></a>00083   }
<a name="l00084"></a>00084 }
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